sing-box/adapter/inbound.go

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package adapter
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import (
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"context"
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"net"
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"net/netip"
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"github.com/sagernet/sing-box/common/process"
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"github.com/sagernet/sing-box/option"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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)
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type Inbound interface {
Service
Type() string
Tag() string
}
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type InjectableInbound interface {
Inbound
Network() []string
NewConnection(ctx context.Context, conn net.Conn, metadata InboundContext) error
NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata InboundContext) error
}
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type InboundContext struct {
Inbound string
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InboundType string
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IPVersion uint8
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Network string
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Source M.Socksaddr
Destination M.Socksaddr
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User string
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Outbound string
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// sniffer
Protocol string
Domain string
Client string
SniffContext any
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// cache
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InboundDetour string
LastInbound string
OriginDestination M.Socksaddr
InboundOptions option.InboundOptions
DestinationAddresses []netip.Addr
SourceGeoIPCode string
GeoIPCode string
ProcessInfo *process.Info
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QueryType uint16
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FakeIP bool
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// rule cache
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IPCIDRMatchSource bool
IPCIDRAcceptEmpty bool
SourceAddressMatch bool
SourcePortMatch bool
DestinationAddressMatch bool
DestinationPortMatch bool
DidMatch bool
IgnoreDestinationIPCIDRMatch bool
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}
func (c *InboundContext) ResetRuleCache() {
c.IPCIDRMatchSource = false
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c.IPCIDRAcceptEmpty = false
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c.SourceAddressMatch = false
c.SourcePortMatch = false
c.DestinationAddressMatch = false
c.DestinationPortMatch = false
c.DidMatch = false
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}
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type inboundContextKey struct{}
func WithContext(ctx context.Context, inboundContext *InboundContext) context.Context {
return context.WithValue(ctx, (*inboundContextKey)(nil), inboundContext)
}
func ContextFrom(ctx context.Context) *InboundContext {
metadata := ctx.Value((*inboundContextKey)(nil))
if metadata == nil {
return nil
}
return metadata.(*InboundContext)
}
func AppendContext(ctx context.Context) (context.Context, *InboundContext) {
metadata := ContextFrom(ctx)
if metadata != nil {
return ctx, metadata
}
metadata = new(InboundContext)
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return WithContext(ctx, metadata), metadata
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}
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func ExtendContext(ctx context.Context) (context.Context, *InboundContext) {
var newMetadata InboundContext
if metadata := ContextFrom(ctx); metadata != nil {
newMetadata = *metadata
}
return WithContext(ctx, &newMetadata), &newMetadata
}
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func OverrideContext(ctx context.Context) context.Context {
if metadata := ContextFrom(ctx); metadata != nil {
var newMetadata InboundContext
newMetadata = *metadata
return WithContext(ctx, &newMetadata)
}
return ctx
}